A disengagement vessel employing a lock hopper effectively reduces concentration
of non-polymer-associated components in the polymer product slurry of a first olefin
slurry polymerization reactor, allowing cascading of a second slurry polymerization
reactor operating at lesser concentration of comonomers, hydrogen, and other components
to produce multicompositional polyolefin polymers and/or polymers having a multimodal
monomer distribution, e.g. diblock polymers having substantially non-overlapping
comonomer contents between the blocks.
